KR20110089959A - Backlight unit having the same, and display apparatus thereof - Google Patents

Abstract

PURPOSE: A backlight unit and display device equipped with the same are provided to increase manufacturing efficiency and to reduce the thickness of a display device. CONSTITUTION: A plurality of light sources is fixed inside a bottom cover and is arranged in a substrate. A light incoming unit(15b) includes an incident surface which is incident from a plurality of light sources to a first direction. A light guide plate(15) includes a light emitting unit which is connected with a light incoming unit.

Description

Backlight unit having the same, and display apparatus

This embodiment relates to a display device.

In general, a display device is a device on which an image is displayed. Recently, a plurality of flat panel display apparatuses capable of being shaped in a two-dimensional display apparatus have been released.

The display device includes a display module for displaying an image and a front cover and a back cover provided at the front and rear of the display module to protect the display module.

The display module generally includes a display panel on which an image is displayed, a backlight unit that provides light to the display panel, and includes a plurality of light sources.

An object of the present embodiment is to provide a display device and a backlight unit in which the thickness is reduced and the image quality is increased.

Another object of the present embodiment is to provide a backlight unit and a display device that provide light and are provided with a modular optical assembly, which is easy to manufacture.

Still another object of the present embodiment is to provide a backlight unit in which light emitted from a plurality of light sources is uniformly provided and a display device employing the backlight unit.

A backlight unit according to an aspect of the present embodiment includes a bottom cover; A plurality of light sources fixed to the inside of the bottom cover and arranged on the substrate, the plurality of light sources emitting light with a predetermined direction angle around the first direction, and light from the plurality of light sources incident in a first direction A light guide plate including a light incident part including an incident surface; and a light emitting part in which the incident light is emitted in a second direction crossing the first direction, and one side of which is connected to the light incident part, and at least a part of the light guide plate. A plurality of optical assemblies including a substrate and a cover surrounding the light source and disposed in a plurality of rows; And at least one driving substrate fixed to an outer side of a bottom surface of the bottom cover and extending in a direction corresponding to at least one of the plurality of rows in which the plurality of optical assemblies are disposed.

A display device according to an aspect of the present embodiment, a display panel that displays an image; A backlight unit positioned on a rear surface of the display panel and divided into a plurality of blocks and individually driving the plurality of blocks; At least one driving substrate provided behind the backlight unit to drive the display panel and / or the backlight unit, wherein the backlight unit includes a bottom cover to which the driving substrate is fixed to the outside of the rear surface of the backlight unit; ; And a plurality of light sources fixed to the inside of the bottom cover and arranged on the substrate, the plurality of light sources emitting light with a predetermined direction angle around the first direction, and light from the plurality of light sources in the first direction. A light guide plate including an incident surface including an incident surface; a light guide plate including a light emission unit in which the incident light is emitted in a second direction crossing the first direction, and one side of which is connected to the light incident unit, and at least a portion of the light guide plate; And a plurality of optical assemblies including a cover surrounding the substrate and the light source and arranged in a plurality of rows, wherein the driving substrate corresponds to at least one column of the plurality of rows in which the plurality of optical assemblies are disposed. Characterized in that extending to.

According to the proposed embodiment, an optical assembly including a plurality of light sources, a light guide plate, and a cover is modularized and assembled to the bottom cover of the backlight unit, thereby simplifying the manufacturing process of the backlight unit and increasing manufacturing efficiency. There is this.

In addition, by providing light to the display panel by using a modular backlight unit including a plurality of light guide plates, the display device is reduced in thickness, and at the same time, partial driving such as local dimming or impulsive is performed. The contrast may be improved by using the scheme.

In addition, the substrates provided in one optical assembly may be connected to a substrate of another adjacent optical assembly, so that a driving signal for driving light sources mounted on the substrate may be transmitted or received to another adjacent substrate, thereby driving the drive. The number of driving substrates for transmitting signals to each of the optical assemblies is reduced, and there is an advantage that the wiring for transmitting the driving signals is simplified.

1 is an exploded perspective view showing the configuration of a display device according to a first embodiment of the present invention.
2 is a cross-sectional view showing a display module configuration according to the AA diagram of FIG.
3 is a plan view briefly showing a configuration of a backlight unit according to a first embodiment of the present invention;
4 is a perspective view showing an optical assembly according to a first embodiment of the present invention;
5 is an exploded perspective view of an optical assembly according to a first embodiment of the present invention.
6 is a cross-sectional view taken along line BB of FIG. 4.
7 is a rear view of the backlight unit according to the first embodiment of the present invention;
8 is a view showing a state in which the substrates of FIG.
9 is a view illustrating a configuration in which a plurality of substrates are arranged in the display device according to the second embodiment of the present invention.
10 is a cross-sectional view of an optical assembly in the display device according to the third embodiment of the present invention.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings. However, the spirit of the present invention is not limited to such embodiments, and the spirit of the present invention may be proposed differently by the addition, change, deletion, etc. of the components constituting the embodiments, but this also applies to the spirit of the present invention. It is included.

1 is an exploded perspective view showing the configuration of a display device according to the present embodiment.

Referring to FIG. 1, the display device 1 according to the present embodiment includes a display module 200, a front cover 300 and a back cover 400 surrounding the display module 200, and a display module 200. It includes a fixing member 500 for fixing to the front cover 300 and / or back cover 400.

One side of the fixing member 500 is fixed to the front cover 300 by a fastening member such as a screw, and then the other side supports the display module 200 with respect to the front cover 300 side, the front cover 300 ) May be fixed to the display module 200.

In this embodiment, the fixing member 500 is described as being formed in a plate shape extending in one direction as an example, but the separate fixing member 500 is not provided, and the display module 200 is provided by the fastening member. It will be said that the configuration fixed to the front cover 300 or the back cover 400 is also possible.

FIG. 2 is a cross-sectional view illustrating a display module configuration according to the A-A diagram of FIG. 1.

1 and 2, the display module 200 includes a display panel 210 on which an image is displayed, a backlight unit 100 that provides light to the display panel 210, and a display module 200. The bottom cover 110 forming the lower exterior, the panel supporter 240 supporting the display panel 210 from the lower side, and the display panel 210 are supported from the upper side to form an edge of the display module 200. Top cover 230.

The bottom cover 110 may be formed in a box shape having an upper surface open to accommodate the backlight unit 100. One side of the bottom cover 110 may be fixed to one side of the top cover 230.

For example, a fastening member such as a screw penetrates the side surface of the display module 200, that is, the side at which the bottom cover 110 and the top cover 230 overlap, and thus the bottom cover 110 and the top cover 230 are disposed. Can be fixed

The bottom cover 110 is provided with at least one substrate 250 for driving the display module 200 by a signal input from the outside, for example, a video signal.

The driving substrates 251 and 252 may be, for example, drivers of a video panel and / or a backlight unit such as a timing controller (T-con board) or a main PCB, and the driving substrates 251 and 252 may be the bottom cover 110. It may be fixed to the back of the for example by a fastening member such as a screw or an adhesive member.

A plurality of elements may be mounted on the driving substrates 251 and 252, and a plurality of cables 253 may be included to connect the elements of the driving substrates 251 and 252 to the optical assembly 10 of the backlight unit 100. In addition, a cable through hole 111 through which the cable 251 penetrates may be formed in the bottom cover 110 forming the rear surface of the backlight unit 100.

Although the display panel 210 is not shown in detail, for example, the lower substrate 211 and the upper substrate 222 bonded to each other so as to maintain a uniform cell gap facing each other, and the interposed between the two substrates. It includes a liquid crystal layer. A plurality of gate lines and a plurality of data lines intersecting the plurality of gate lines may be formed on the lower substrate 211, and a thin film transistor (TFT) may be formed at an intersection of the gate lines and the data lines. have.

Color filters may be formed on the upper substrate 212. The structure of the display panel 210 is not limited thereto, and the display panel 210 may have various structures. As another example, the lower substrate 211 may include not only a thin film transistor but also a color filter. In addition, the display panel 210 may be formed in various shapes according to a method of driving the liquid crystal layer.

Although not shown, a gate driving printed circuit board (PCB) for supplying a scan signal to the gate line and a data driving printed circuit board (PCB) for supplying a data signal to the data line are provided at the edge of the display panel 210. It may be provided. Meanwhile, a polarizing film (not shown) may be disposed on at least one of the top and bottom of the display panel 210.

Meanwhile, the backlight unit 100 according to the present exemplary embodiment includes a plurality of optical assemblies including a light source 13, a light source unit substrate 14, a light guide plate 15, a reflective member 17, and a cover 18 and 19, respectively. The optical sheet 220 may be provided between the 10 and the display panel 210.

The optical sheet 220 according to the present embodiment may be removed, but is not limited thereto. The optical sheet 220 may include a diffusion sheet (not shown) and / or a prism sheet (not shown).

The diffusion sheet evenly spreads the light emitted from the light guide plate, and the diffused light may be focused onto the display panel by the prism sheet. Here, the prism sheet may be selectively configured using a horizontal or / and vertical prism sheet, one or more roughness reinforcing films, and the like.

Type or number of optical sheets 220 may be added or deleted within the technical scope of the embodiment, but is not limited thereto.

On the other hand, a plurality of optical assemblies 10 are arranged, and are disposed below the display panel 210 and the optical sheet 220 to emit light upward and irradiate the light to the display panel 210.

The optical assembly 10 includes a light source 13 that emits light in a state having a predetermined direction angle about a first direction that is a y-axis direction, and a z-axis light emitted by the light source 13 in the first direction. And a light guide plate 15 for diffusing light in a second direction which is a direction.

In this case, the light guide plate 15 included in the optical assembly 10 may diffuse the light incident part 15b into which the light is incident in the first direction and the light incident into the light incident part 15b in the second direction. And a light emitting portion 15a.

The detailed configuration of the optical assembly 10 will be described later.

3 is a plan view briefly illustrating a configuration of a backlight unit.

2 and 3, the backlight unit 100 includes, for example, a plurality of light guide plates 15 (N being two or more) in the first direction, which is the y-axis direction, and the backlight unit 100. The plurality of light guide plates 15 (M is 2 or more) may be provided in a third direction, which is an x-axis direction intersecting the y-axis, on the plane to be formed.

At this time, the light emitting portion 15a of one of the light guide plates 15 of the light guide plate 15 arranged in the first direction is disposed above the light incident portion 15 of the other light guide plate 15. At least two light guide plates 15 adjacent to each other in a first direction may partially overlap each other.

That is, the other end of the light emitting portion 15a of the Kth (K is any one of 1 to N-1) of the N light guide plates is the light incident portion 15b of the K + 1th light guide plate. At least a portion of the at least two light guide plates 15 adjacent to each other may be provided in a state of overlapping each other.

In addition, the optical assemblies 10 adjacent to each other are disposed to be spaced apart from each other by a predetermined distance d2 and d1 to form a space having a predetermined size.

That is, the light emitting portions 15a of the two light guide plates 15 disposed in the first direction (y-axis direction), which are the central directions in which light is emitted from the light source 13, are adjacent to each other in the first direction. Spaced apart from each other at an interval d1.

In addition, the light guide plates 15 disposed in the third direction (x-axis direction) crossing the first direction and adjacent to each other are spaced apart from each other at a second spacing d2.

In this case, the plurality of first separation intervals d1 may be formed in a third direction (x-axis direction), and the plurality of second separation intervals d2 may be formed in a first direction (y-axis direction). The separation interval d1 and the second separation interval d2 intersect each other.

A bright line or a dark line may appear in the region 60 corresponding to the boundary portion at the boundary portion between the optical assemblies 10 and the light guide plate 15 adjacent to each other in the above-described distances d2 and d1.

That is, as the distances d1 and d2 between the light guide plates 15 adjacent to each other become narrower, the amount of light emitted to the front through the boundary portion increases, so that in the region 60 corresponding to the boundary portions between the light guide plates 15, As the brightness of the light increases, the bright line may appear, and thus, the bright line may be visually exposed on the display screen.

That is, as the distances d1 and d2 between the light guide plates 15 adjacent to each other become wider, the amount of light emitted to the front through the boundary portion decreases, and thus, in the region 60 corresponding to the boundary portion between the light guide plates 15. As the luminance of light decreases, dark lines may appear.

Therefore, according to the exemplary embodiment of the present invention, the distances d1 and d2 between the light guide plates 15 adjacent to each other are in a numerical range where no bright lines or dark lines appear at the boundary, that is, the first spaced distance d1 is, for example, 0.1. In a size between mm and 7 mm, the second separation distance d2 may be formed in a size between 0.1 mm and 7 mm, for example.

In addition, at least a portion of the reflective member 17 of the light guide plate 15 of the two light guide plates 15 adjacent to each other is positioned in the spaced space, and an inner surface of the bottom cover 110 is formed through the spaced space. Exposure to the first direction (y-axis direction) is prevented.

Meanwhile, in the display device 1 according to the exemplary embodiment, three optical assemblies 10 are disposed in the first direction, and three optical assemblies 10 are disposed in the third direction. A backlight unit 100 that satisfies the light guide plate arrangement condition is described.

The optical assemblies 10 can be fabricated as independent assemblies and can be placed in close proximity to form a modular backlight unit. Such a modular backlight unit may provide light to the display panel 210 as a backlight means.

The backlight unit 100 may be driven by a full driving method or a partial driving method such as local dimming or impulsive. That is, the backlight unit 100 is divided into a plurality of divided driving regions corresponding to the plurality of light guide plates 15, and each of the divided driving regions corresponds to a luminance or color coordinate signal of an image signal input to the display panel 210. Therefore, the brightness can be adjusted. Similarly, the display panel 210 is also divided according to the division driving area.

The driving method of the light emitting diode may be variously changed according to a circuit design, but is not limited thereto. As a result, the color contrast ratio is increased and the image of the bright and dark portions on the screen can be clearly expressed, thereby improving image quality.

That is, the backlight unit 100 is operated by being divided into a plurality of divided driving regions corresponding to the plurality of light guide plates 15, and the black portion of the image is luminance by linking the luminance of the divided driving regions with the luminance of the image signal. By reducing the brightness and increasing the brightness, brightness and contrast can be improved.

Meanwhile, an area of the display panel 210 corresponding to one optical assembly 10 or one light guide plate 15 may be divided into two or more blocks, and the display panel 210 and the backlight unit may be divided into blocks. Can be driven.

At this time, the light guide plate 15 of the optical assembly 10 of C1 to C3 is disposed in the central column C in the backlight unit 100, and the left and right columns L and R are centered around the central column C. The light guide plates 15 of L1 to L3 and the light guide plates 15 of R1 to R3 are disposed respectively.

In more detail, as described above, nine light guide plates 15 may be arranged in three rows and three columns in the backlight unit 100 according to the present exemplary embodiment. In addition, a reflecting member 17 is disposed below each of the light guide plates 15 so that light incident on the light guide plate 15 in the first direction may cross in the second direction (z-axis direction). Allow light to be emitted.

In this case, at least a portion of the reflective member 17 disposed on the light guide plate 15 of the optical assembly 10 of C1 to C3 disposed in the central column C is further extended toward the outer edge of the light guide plate 15. . In addition, an extended portion of the reflective member 17 positioned on the center row C overlaps the reflective member 17 located on the left row L and the right row R side.

4 is a perspective view illustrating an optical assembly according to a first embodiment of the present invention, and FIG. 5 is an exploded perspective view of an optical assembly according to a first embodiment of the present invention. 6 is a cross-sectional view taken along line B-B of FIG. 4.

4 to 6, the optical assembly 10 of the display apparatus 1 according to the present exemplary embodiment may be arranged at least partially fixed to the bottom cover 110.

The optical assembly 10 includes a plurality of light sources arranged on the light source unit substrate 14 and the light source unit substrate 14 to emit light with a predetermined direction angle θ about the first direction (y axis direction). 13 and a light incident portion 15b including an incident surface 151 through which light is incident from a plurality of light sources 13 in a first direction, and a second direction in which the incident light intersects with the first direction ( z-axis direction) and one side of the light guide plate 15 including a light emitting portion 15a connected to the light incident portion 15b, at least a portion of the light guide plate 15, the substrate and the light source is wrapped, the light guide plate 15 ) And covers 18 and 19 for fixing the light source 13.

In more detail, at this time, the light source 13 may be configured to include a light emitting diode (LED) or a plurality of light emitting diodes (LEDs).

The light emitting diode may be a side light emitting type for irradiating light to the side. It may be implemented as a colored LED emitting at least one of colors such as red, blue, and green, or an LED emitting yellow light by applying a yellow phosphor to the blue LED.

The light emitting diodes may be disposed on the light source substrate 14, and may be provided as light emitting diodes emitting light having a wavelength between 430 nm and 480 nm, and the light emitting surfaces of the light emitting diodes may be emitted from the light emitting diodes. The phosphor coated to pass light may be provided.

The colored LED may include at least one of a red LED, a blue LED, and a green LED, and the arrangement and emission light of such a light emitting diode may be changed within the technical scope of the embodiment.

In addition, the light sources 13 according to the present exemplary embodiment emit light with a predetermined direction angle θ around the first direction.

The plurality of light sources 13 are disposed in the substrate body 141 of the light source unit substrate 14 extending in a direction parallel to the third direction (x-axis direction), and the first direction (of the substrate body 141). the back eccentric position with respect to the y-axis direction).

That is, the light source 13 is mounted in the rear region based on the first direction of the substrate body 141, and the front region is formed at the front side of the rear region k2, and the size of the front region is the rear region. It may be formed larger than the size of.

It is necessary to secure a support space of a predetermined size in which the at least a portion of the light guide plate 15 and the reflective member 17 can be supported in the front region, and only the width in which the light source 13 can be mounted is secured in the rear region. This is because the width of the rear region should be reduced to a minimum because the width of the bezel region of the display module where the rear region k2 is located, that is, the edge of the display module, may decrease as the size decreases.

In this case, the first direction (y-axis direction) may be referred to as a front-rear direction with respect to the light guide plate 15, and the third direction (x-axis direction) may be referred to as a left-right direction with respect to the light guide plate 15. In addition, in the front-rear direction, the front means a direction (+ y-axis direction) in which light is incident from the light source 13 to the light guide plate 15, and the rear means an opposite direction (-y-axis direction) of the front side.

The light guide plate 15 may be made of a transparent material, and may include, for example, one of an acrylic resin series such as polymethyl metaacrylate (PMMA), polyethylene terephthlate (PET), polycarbonate (PC), and polyethylene naphthalate (PEN) resin. have. The light guide plate 15 may be formed by an extrusion molding method.

The light guide plate 15 scatters the light incident from the light source 13 and guides the light to emit light upward.

The light guide plate 15 refracts and scatters light incident from the light source 13 in front (y-axis direction), that is, side-side incident light, and emits light in an upward direction (z-axis direction), that is, in the direction of the display panel 210. The bottom surface of the light guide plate 15 may be inclined upward toward the front to efficiently emit light incident from the side.

The covers 18 and 19 are connected to the first cover 18 and the first cover 18 on which at least a portion of the upper surface of the light guide plate 15 is supported, and the second cover on which at least a portion of the lower surface of the light guide plate 15 is supported. Cover 19. The light source unit substrate 14 on which the light sources 13 are mounted is mounted on the inner surface of the second cover 19.

In addition, a fastening member such as a screw penetrates through the first cover 18 and the second cover 19 to fix the first cover 18, the second cover 19, and the light source unit substrate 14 integrally. Let's do it. In this case, when the first cover 18 and the second cover 19 are fixed, at least a part of the light guide plate 15 is sandwiched between the first cover 18 and the second cover 19, so that the light guide plate 15, Coupling between the light source unit substrate 14 and the light sources 13 may be performed.

In addition, the first cover 18 is formed to be bent with respect to the first region 181 and the first region 181, the inner surface of which is in contact with the upper surface 152 of the light incident part, and one side thereof is in contact with the second cover 19. The second area 182 is included.

In this case, the distance between the inner surface of the second region 182 and the inner surface of the second cover 19 is smaller than the distance between the inner surface of the first region 181 and the inner surface of the second cover 19.

In addition, the fastening member 70 penetrates the first cover 18, the reflective member 17, the light source unit substrate 14, and the second cover 19 of the optical assembly 10 according to the present embodiment, respectively. The first cover side through hole 185, the reflective member side through hole, the substrate side through hole 145, and the second cover side through hole may be formed to fix the components to each other.

The light guide plate 15, the light source unit substrate 14, the light sources 13, and the substrates 18 and 19 are fixed to each other so that one optical assembly 10 is assembled and then the plurality of optical assemblies 10 are As shown in FIG. 3, the bottom cover 110 is fixed to the bottom cover 110. In this case, the covers 18 and 19 provided on one side of the optical assembly 10 are fixed to the bottom cover 110, so that the fixing of the optical assembly 10 to the bottom cover 110 may be performed.

Meanwhile, driving signals for driving the plurality of light sources 13 are input to the substrate 14 of the optical assembly 10 according to the present embodiment from the driving substrates 251 and 252. In addition, a driving signal transmission cable 253 connecting the driving substrates 251 and 252 and the substrate 14 is connected to the rear surface of the substrate 14, that is, the rear surface of the substrate 14 supported on the inner surface of the second cover 19. A cable connecting unit 147 (see Fig. 7) is formed.

Hereinafter, a configuration in which the substrate 14 of the optical assembly 10 and the driving substrates 251 and 252 are connected will be described in detail.

7 is a view illustrating a rear surface of the display module according to the first embodiment of the present invention, and FIG. 8 is a view showing a state in which the substrates of FIG. 7 are arranged.

First, referring to FIG. 7, a first driving substrate 251 and a second driving substrate 252 are provided outside the bottom of the bottom cover 110 forming the rear surface of the display module 200.

In this case, the first driving substrate 251 and the second driving substrate 252 are respectively disposed at positions corresponding to the right row R and the left column L on which the plurality of optical assemblies 10 are disposed. In addition, the first driving substrate 251 and the second driving substrate 252 are formed to extend in a direction corresponding to the right row R and the left row L, respectively, and the light sources 13 of the optical assembly 10 are formed. It includes a plurality of elements for inputting a drive signal for.

Meanwhile, a plurality of cable through holes 111 are formed on the bottom of the bottom cover 110, and the plurality of cable through holes 111 are adjacent to the first driving substrate 251 and the second driving substrate 252. It is arranged along the right row R and the left row L.

In the display module 200 according to the present exemplary embodiment, the cable connection unit 147 of the substrate 14 is formed on the rear surface of the substrate 14 and a cable through hole (not shown) formed in the second substrate 19. And one side of the driving signal transmission cable 253 passing through the cable through hole 111 of the bottom cover 110.

The other side of the driving signal transmission cable 253 is connected to the first driving substrate 251 or the second driving substrate 252 to the substrate 14 and the light source 13 of one optical assembly 10. The driving signal is transmitted.

Next, referring to FIG. 8, a state in which the left column substrate 14L, the center row substrate 14C, and the right row substrate 14R are disposed in a state where the display module 30 is viewed from the front, unlike FIG. 7. Shows.

The left column provided on one side and the other side of the central row substrate 14C is not formed in the central row substrate 14C disposed in the central row C, and a separate cable connection unit for connection with the driving substrates 251 and 252 is not formed. A first connecting portion 141C and a second connecting portion 142C for connecting with the left column side connecting portion 141L and the right column side connecting portion 141R of the substrate 14L and the right column substrate 14R are included.

At this time, the first connecting portion 141C and the second connecting portion 142C are provided at one end and the other end of the central row substrate 14C, respectively, and directly contact the left row side connection part 141L and the right row side connection part 141R. The first driving signal and the second driving signal are transmitted through the left column board 14L and the right column board 14R, respectively.

The plurality of light sources 13 mounted on one surface of the central heat substrate 14C may include a first light source group 13A driven according to the first drive signal and a second light source group driven according to a second drive signal ( 13B).

At this time, the first light source group 13A and the second light source group 13B are driven at the same time or are driven at different times, respectively, so as to be driven as two light emitting blocks in one optical assembly 10, the display module ( Contrast ratio difference with respect to the image panel 210 in the 100 can be maximized.

On the other hand, the central row substrate 14C according to the present embodiment includes a first connection portion 141C and a second connection portion 142C, and the left row side connection portion (14R) of the left row substrate 14L and the right row substrate 14R, respectively, 141L and the right column side connecting portion 141R, the center row substrate 14C includes only one connecting portion, and the connecting portion includes the left column side connecting portion 141L or the right row of the left column substrate 14L. It will be said that the structure connected with any one connection part of the right side column side connection part 141R of the board | substrate 14R is also possible.

According to the proposed embodiment, as the cover which fixes the optical assembly directly to the light source of the optical assembly for providing light in the display device, there is an advantage that the heat due to the light emitting operation can be smoothly dissipated.

In addition, by providing light to the display panel by using a modular backlight unit including a plurality of light guide plates, the display device is reduced in thickness, and at the same time, partial driving such as local dimming or impulsive is performed. The contrast may be improved by using the scheme.

In addition, the substrates provided in one optical assembly may be connected to a substrate of another adjacent optical assembly, so that a driving signal for driving light sources mounted on the substrate may be transmitted or received to another adjacent substrate, thereby driving the drive. The number of driving substrates for transmitting signals to each of the optical assemblies is reduced, and there is an advantage that the wiring for transmitting the driving signals is simplified.

9 is a view illustrating a configuration in which a plurality of substrates are arranged in the display device according to the second embodiment of the present invention.

The present embodiment differs only in the connection configuration between the connecting portions of the substrate, and in other configurations is substantially the same as the configuration of the first embodiment, so that the following description focuses on the features of the present embodiment.

Referring to FIG. 9, one side and the other side of the center row substrate 14C according to the present exemplary embodiment are provided to be spaced apart from the left row substrate 14L and the right row substrate 14R by a predetermined distance.

The first connection member 81 and the second connection are connected between the first connection portion 141C and the second connection portion 142C, the left column side connection portion 141L, and the right column side connection portion 141R of the center row substrate 14C, respectively. The member 82 is provided and connects each connection part mutually.

That is, in the display apparatus 1 according to the present exemplary embodiment, separate connection members 81 and 82 are provided to transmit the driving signal to the substrates in the adjacent rows or to receive the driving signals from the substrates in the adjacent rows.

The connection members 81 and 82 according to the present exemplary embodiment may be provided as data transmission / reception cables such as, for example, a flexible flat cable.

10 is a view showing a cross section of the optical assembly in the display device according to the third embodiment of the present invention.

The present embodiment is the same as the first embodiment in other configurations, and there is a difference only in the configuration of the light guide plate 15. Hereinafter, the characteristic parts of the present embodiment will be described.

Referring to FIG. 10, the bottom surface 154 of the light guide plate 15 according to the present exemplary embodiment may be parallel to the top surface 152 of the light receiving portion 15b side and the top surface of the light emitting portion 15a side of the light guide plate 15. Is formed extending.

That is, unlike the light guide plate 15 according to the first embodiment in which the bottom surface 154 is formed to be inclined, the light guide plate 15 according to the present embodiment is formed in an overall flat shape.

1-> display device
200-> Display Module
100-> Backlight Unit
110-> Bottom Cover
10-> optical assembly
13-> light source
14-> Board
141L, 141R-> Left column side connection and Right column side connection
141C, 142C-> First and Second Connections
15-> Light Guide Plate
15a-> light emitting part
15b-> incoming light
155-> Optical Unit
17-> Reflector
18-> 1st cover
19-> 2nd Cover

Claims (17)

Bottom cover;
A plurality of light sources fixed to the inside of the bottom cover and arranged on the substrate, the plurality of light sources emitting light with a predetermined direction angle around the first direction, and light from the plurality of light sources incident in a first direction A light guide plate including a light incident part including an incident surface; and a light emitting part in which the incident light is emitted in a second direction crossing the first direction, and one side of which is connected to the light incident part; A plurality of optical assemblies including a substrate and a cover surrounding the light source and disposed in a plurality of rows; And
And at least one driving substrate fixed to an outer side of the bottom cover and extending in a direction corresponding to at least one of the plurality of rows in which the plurality of optical assemblies are disposed. The method of claim 1,
Wherein said substrate of any one of said plurality of optical assemblies is connected to each other said substrates of another optical assembly adjacent to said optical assembly. The method of claim 1,
One side of the substrate is provided with a connection,
And the connecting portion of the substrate of the optical assembly provided in any one row is connected to the connecting portion of the substrate of the optical assembly in another row adjacent to the optical assembly, and receives a driving signal for the light source. . The method of claim 3, wherein
And said connecting portion of the substrate of the optical assembly provided in any one row is connected to the connecting portion of the substrate of the optical assembly in another row adjacent to the optical assembly via a connecting cable. The method of claim 3, wherein
And the connection portion of the substrate of the optical assembly provided in one row and the connection portion of the substrate of the optical assembly in another row adjacent to the optical assembly are in contact with each other. The method of claim 3, wherein
One side and the other side of the substrate of the optical assembly disposed in any one column is provided with a first connection portion and a second connection portion, respectively
And a connection part to which the first connection part and the second connection part are connected is provided in each of the substrates of the other two rows of optical assemblies adjacent to the row. The method according to claim 6,
The plurality of light sources mounted on the substrate including the first and second connectors may include a first light source group operated by a first driving signal input to the first connector and a second input to the second connector. And a second light source group operated by the two driving signals. The method of claim 3, wherein
Backlight unit, characterized in that any one of the two substrates of the optical assembly connected by the connecting portion is connected to the drive substrate. The method of claim 1,
And a plurality of divided driving regions corresponding to the plurality of light guide plates, wherein each of the divided driving regions is configured to adjust luminance according to the luminance of the image signal or the color coordinate signal. The method of claim 1,
A driving signal transmission cable for transmitting a driving signal of the driving substrate for driving the light source to the substrate;
And a cable through hole through which the drive signal transmission cable passes. The method of claim 10,
And the cable through hole is formed of a plurality of holes respectively corresponding to the plurality of optical assemblies arranged in any one row. A display panel on which an image is displayed;
A backlight unit positioned on a rear surface of the display panel and divided into a plurality of blocks and individually driving the plurality of blocks;
At least one driving substrate provided behind the backlight unit and configured to drive the display panel and / or the backlight unit;
The backlight unit,
A bottom cover to which the driving substrate is fixed outside the rear surface; And
A plurality of light sources fixed to the inside of the bottom cover and arranged on the substrate, the plurality of light sources emitting light with a predetermined direction angle around the first direction, and light from the plurality of light sources incident in a first direction A light guide plate including a light incident part including an incident surface; and a light emitting part in which the incident light is emitted in a second direction crossing the first direction, and one side of which is connected to the light incident part; A plurality of optical assemblies including a substrate and a cover surrounding the light source and disposed in a plurality of rows;
And the driving substrate extends in a direction corresponding to at least one or more columns of the plurality of rows in which the plurality of optical assemblies are disposed. The method of claim 12,
One side of the substrate is provided with a connection,
And the connecting portion of the substrate of the optical assembly provided in any one row is connected to the connecting portion of the substrate of the optical assembly in another column adjacent to the optical assembly, and a driving signal for the light source is input. . The method of claim 13,
One side and the other side of the substrate of the optical assembly disposed in any one column is provided with a first connection portion and a second connection portion, respectively
And a connecting portion to which the first connecting portion and the second connecting portion are connected to each of the substrates of the other two rows of optical assemblies adjacent to the row. The method of claim 14,
The plurality of light sources mounted on the substrate including the first and second connectors may include a first light source group operated by a first driving signal input to the first connector and a second input to the second connector. And a second light source group operated by two driving signals. The method of claim 13,
And any one of the substrates of the two optical assemblies connected by the connecting portions is connected to the driving substrate. The method of claim 12,
The display panel is divided into a plurality of divided driving regions corresponding to the plurality of light guide plates,
A brightness of each of the divided driving regions is adjusted by adjusting luminance of at least one light source corresponding to the light guide plate corresponding to each of the divided driving regions according to the luminance of the image signal or the color coordinate signal. Device.

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